function zXmlHttp() {
}

zXmlHttp.createRequest = function ()/*:XMLHttp*/ {
			//Create HttpRequest 
			var http_request = false;
			
			if(window.XMLHttpRequest) {
				http_request = new XMLHttpRequest();
				if(http_request.overrideMimeType){	//
					http_request.overrideMimeType('text/html');
				}
			}else if(window.ActiveXObject){	//
				try{
					http_request = new ActiveXObject("Msxml2.XMLHTTP");
				}catch(e){
					try{
						http_request =  new ActiveXObject("Microsoft.XMLHTTP");
					}catch(e){}
				}			
			}
			if(!http_request){	//
				window.alert("Create XMLHttpRequest Object failuer!");
				return false;
			}		
			return http_request;	
};